I found a nice old 1200 baud external modem, it looks like the usual Hayes smart modem clone, complete with removable front panel to access a bunch of DIP switches.
Thing is, there is nothing popping up for ZEI brand modems. Anyone ever heard of these?
Hey it was 8$ with power supply. It looks like a metal badge is missing on the power supply, so there's no info to be had there.